Grinding and polishing machine.



PATENTED OCT. 10, 1905.

T. A. PANYARD. GRINDING AND POLISHING MACHINE.

APPLICATION FILED JUNE 12 1905.

UNITED STATES PATIENT OFFICE.

THOMAS A. PANYARD, OF MlLlVAUKEE, \VISCONSIN, ASSIGNOR TO LUTHER BROTHERS COMPANY, OF MILW'AUKEE, \VISCONSIN.

GRINDING AND POLISHING MACHINE.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed e 12,1905. Serial No. 264,797.

To (NZ whom, it may concern:

Be it known that I, THOMAS A. PANYARD, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Grinding and Polishing Machines and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention refers to grinders or polishers, its object being to construct such a machine that the abrading-wheel thereof is capable of adjustment to various angles required for different classes of work; and it consists in certain peculiarities of construc tion and combination of parts to be fully set forth hereinafter with reference to the accornpanying drawings and subsequently claimed.

In the drawings, Figure 1 represents a side elevation of a machine in accordance with my invention, partly broken away and having parts thereof in section as indicated by line 1 l in Fig. 2 Fig. 2, a vertical cross-section indicated by line 2 2 in Fig. 1, and Fig. 3 a detail face view of the gearcover of said machine.

Referring by letter to the drawings, A is a bracket provided with a foot (6 and clamping-screw b, the upper extension of said bracket terminating in a sleeve B, which sleeve supports the hub C of a circular gearcasing D, the latter being held in its position by a set-bolt e, threaded into the sleeve The gear-casing D has a tangential barrel IQ extending therefrom and in which is mounted a driving-spindle F, having its inner end formed with a double-threaded worm G and terminating in a reduced portion which has a bearing in the gear casing. The end thrust of said spindle is taken up by a setscrew (l, threaded into the back of the casing D aforesaid. The spindle F just outside of the barrel has shrunk thereon a collar 6, which forms a shoulder for the grindingwheel II, that is carried by said spindle. The wheel H is preferably composed of abrading surfaces of different degrees of coarseness on its sides, and for this reason it is made reversible, there being corresponding countersunk annular recesses fin said wheel adapted to fit the collar 6, and a retaining-washer g of the same diameter as the collar engages a recess of the aforesaid wheel, which is held in place by a screw It being threaded into the end of the spindle against said washer.

A right-angle tool-rest I passes over the face and outside surface of the grindingwheel and has a depending ear Ii, into which is threaded a screw 7', that engages the slotted end of a supporting-arm J, the hub K of which is mounted upon the end of the barrel E and may be adjusted radially upon the latter and is held in its adjusted position by a set-screw Z engagingits hub. The worm G of the spindle meshes with a worm-wheel K, that is housed in the casing D, and a shaft L is secured to said worm-wheel and projects through and has its bearings in the hub C of said casing. This shaft is provided with a driving-crank M, that is secured thereto by a set-screw m. A gear-cover N is pitted to the front of the gear-casing D by screws n, and in order to prevent end movement of the spin dle F the latter is provided with an annular groove 0, which is engaged by a spanner-lug p projecting inward from said gear-cover.

From the foregoing description it will be readily understood that by loosening the setbolt 0 the gear-casing may be revolved within the sleeve B of bracket A in either direction from that shown in the drawings, and thereby bring the grinding wheel at the angle desired for the particular work to which it is to be applied as, for instance, if a flat tool, such as a clipper-blade, is to be ground the wheel would be adjusted to a vertical position and the flat surface or side of said wheel be utilized, the bolt 0 having first been tightened to hold the device in this position.

Having thus described my invention, what I claim as new, and desire to secure by Let ters Patent, is

1. In a grinder or polisher, a clampingbracket, and a gear-casing provided with a hub adj ustably mounted in said bracket and means for holding the casing in its adjusted position, a driving-shaft mounted in the hub of the aforesaid gcarcasing, a spindle hav ing its bearings in the casing in gear connection with the driving-shaft, and an abradingwheel secured to the spindle.

2. In a grinder or polisher, a clampingbracket, a gear-casing provided with a central hub adjustably mounted in said bracket, and means for holding the casing in its adj usted position, a driving-shaft mounted in the hub of the aforesaid gear-casing, a spindie having its bearings in the casing at a tangent to the hub thereof and provided With a Worm, and a w0rm-whee1 secured to the said driving-shaft in mesh with the aforesaid Worm.

3. In a grinder or polisher, an abrading- Wheel, a spindle for the same provided With. a gear, and a driving-shaft having a gear in mesh with the gear of said spindle, a gear- IO easing mounted upon the drive-shaft and arranged to carry the spindle, and means for adjusting said casing around the drive-shaft.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in

the county of Milwaukee and State of Vis- 15 eonsin, in the presence of tWo Witnesses.

THOMAS A. PANYARD. Witnesses:

SAM NEWMAN, GEO. W. YOUNG. 

